I can’t say enough good things about the 15-22. I have been using one for five years, have around 40,000 rounds through it. Tuned the ejector and put in a Volquartsen extractor and it has been utterly reliable with HV or SV ammo. They will break a firing pin about every 15,000 rounds but Smith will send you a new one if you do.
I had an H&K 416 previously but like the 15-22 much better. The big advantage of the 15-22 over the 416 are similarities to the full size AR. All the controls are the same and most aftermarket stuff fits, especially triggers. With a 3.5# CMC drop in trigger, it is a pleasure to shoot.
